A law enforcement official says tests have determined that a powder found inside an envelope delivered to CNN along with a pipe bomb was harmless.

The official wasn’t authorized to discuss the investigation publicly and spoke to The Associated Press on condition of anonymity.

The New York Times reported Wednesday that bomb technicians who studied the device said it "had hallmarks" of a "fake explosive" of "the kind more typically depicted on television and in movies, rather than devices capable of detonating."

"Some bomb technicians who studied photos of the device [...] suggested that the bomb sent to CNN had hallmarks of fake explosives — the kind more typically depicted on television and in movies, rather than devices capable of detonating" https://t.co/nJ97wDpvs9

None of the devices harmed anyone, and it was not immediately clear whether any of them could have. One law enforcement official said investigators were examining the possibility that they were hoax devices that were constructed to look like bombs but would not have exploded.

[...]A digital clock was taped to the middle of the pipe, a feature that experts say is typically shown on fictional bombs in an attempt to ratchet up dramatic tension, but unnecessary in real life.

In fact, bombmakers generally avoid attaching visible clocks to their devices to keep from tipping off their targets about when the bombs are set to explode.

Though Governor Andrew Cuomo said early Wednesday that a "device" was mailed to his office it later turned out to be "a letter and a USB flash drive" with information about the Proud Boys that was completely unrelated.